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yGEORGE A. JQY-NESfOF NEW YORK', N, Y.

Leafs Parent No. 74,695, sans Femm/'18, lees;

IMPROVEMENTIN TRANS FOR LAMPS.`

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To ALL wHoM ITMAY coNcnRN:

Be it known that I, GOGE A. JONES, of the city of New York, in the county of Ne\v York, and State of New York, have invented certain new andnseful Improvements in' Mechanical Movements or Trains for Lamps; and I do hereby declare that the following is a full, clear, and exact description thereof, and oith'eir mode orV manner of operation, reference lbeing had to the accompanying drawings, and to the letters of reference marked thereon,and making a part of this specification. i v i h My invention has reference more particularly to the trains or mechanical movements usedin such lamps as are the subjeet-matter of Letters Patent of the United States, granted February `10, 1863, to F. B. Caravanan, and which are intended to burn kerosene and oils rich in carbon, and in-which the mechanism is used to force up .to the wick an increased supply of atmospheric air, and consistsin such improvements in theconstruction and arrangement of different parts of the mechanism as greatly reduces` the cost 'of construction of' such mechanism withoutimpairing its efficiency. i Y i Figures 1 and 2 are representations of thevopposite side plates sustaining the mechanism.

Figures 3 and 4 are perspective views of the-,mechanism fromopposite sides.

Figure 5 is a detached view of the air-tube, so called.

Figure 6'is a detached view of the endless screwnnd itsrwhcel.

Figure 7 isla-detachedview of ajewel-plate. l

It has always been a serious .objection to such lamps as make use of a train of mechanism, that the cost of such mechanism adds very much to the cost of the lamp, and thereby to a great degree prevents any. very general use of such kind of lamps. In lamps employing or using suchmeehanism, and which are arranged and i designed to burn kerosene and other similar oils, as are those lamps patented to said Caravanan, it is particulaily desirable. to reduce the cost of construction as much as possible, so that such lamps can' be brought within the reach of .the commpnity generl'allly. My improvements have special reference to such end or purpose, and by their use the cost of construction of the mechanical movement, Vand consequently of' the whole lamp, can be much reduced, and at thesame time the action of the mechanism improvedyand rendered. more certain and uniform.'

or'spindles, have been-made from a single piece of metal, the whole being reduced to propershape and relative proportions in a lathe, and the leaves or teeth of the pinion cut by mechanism constructed for that purpose.' Such construction is necessarily expensive. .For pinions and arbore so'constructedI employpinions madefrom sheetibrass, ont out by a suitable die, which can be done cheaply and rapidly, such piecesof brass which ferm the e Vds of the pinions beingr connected and fastened together by small steel wires, as seen in g. 3whic`h wires formthe leaves or teeth of 'the pinion, a central wire passing'throngh the pinion forming the spindle or arbor.V The use of such open or lantern-pinion greatly reduces the cost of this part ofthe meehan'ism,"and renders available a pinion which clears' itself,` and requires but little if any cleaning. Y Y

'The air-tube in such mechanism, or the -short tube b, `which contains thcfan-bllower, has heretofore been In the mechanical movements of such lamps, as heretofore constructed, the pinions a a, with their arbore made up of a number of pieces, as the tube proper,` the ea'rs or projections by which it is connected with the side plates, and the cross-bar on' top of such tube, which supports the upper end of the 'spindle of the fanblower, and these haverequired to befitted to each other, and then'fastenedby screwsftc. I forrnsuch tube, and all the said several parts, from one piece of metal, which can be `struck ont-by a die fromsheet metal, and which requires only to be bent into the form of a tube, and then soldered, andfhave its parte bent down toform the support forthe upper end otv the fanespindle, when -the tube is,vas shown in lig. 5, ready for use.

The fan-spindle or endless screw, d, has heretofore been constructed with a thread having a double face,I thereby requiring a wheel, which gears into it, with pointed and'delicate teeth or cogs. Experience has'proved,l

however' carefully such screw and wheel may be constructed, that their action is liable to he imperfect.` I over1 come sneh-dcfect'by making the screw with a single thread, havingji` vertical sides vand a dat top, as shown in iig.

6, and combining with such screw, when so constructed, a wheel, e, with a squaretooth adapted to'gear into such screw. The action andoperstion of such screw and its operating-wheel are thus muchimproved, and rendered more uniform. i Y 1 x The plate or bridge c', which forms the support of ythe'lower (end of the fan-spindle, or endless 4screw d,

instead of bcingsecured to the plate by one or more screws, as heretofore, is riveted thereto, as seen at o, igs.

2 and 3. Construction isthereby facilitated, and its cost reduced, and the connection between such bridge and the side plate of the mechanism is rendered more perfect and secure. The jewel-plates or straps n, which corrine the jewels on which the spindle ofthe fan or the endless screw druns, are made so that they are secured to the plates c ciby a single screw instead of by two or more, as heretofore, and the jewelsockct is simply a concave conical seat formed in such plates, as shown in fig. 7. Instead, also, of the use of a closed drum to contain the main or power-spring g, I make Yuse4 of a simple band,f, which need be only sufciently wideto confine the spring, so as t'o prevent it unduly expanding as it uncoils. Such band is riveted together with the mainspring hook or otherwise, and is also riveted to thc main-spring wheel, thus avoiding soldering, as well as cheapening manufacture. Instead, also, of securing the ratchet It upon the arbor L in the usual manner, by means of a pin passing 'through such arbor, and' having also an independent fastening for the click l, I conneboth the ratchet and click, and hold them in their proper. relative position by means of the click-plate 171, vtvbtich' is secured bythe same scretv which fastens the click, and such plate,'by passing over-the arbor t, serves to` strengthen and stitfevn it. Such` arrangement also facilitates the removal of theA several parts when necessary. By these improvements the several'parts of the mechanism are rendered rmer and stronger, their action is rendered more uniform and certain, and the cost of the construction of the whole is -very much reduced.

What I claim as my invention,- anddesire to secure by Letters Patent, is-l 1. In a train or mechanism designed for usein lamps, the application and use ofthe open orlantern-pinion-A and its arbor, constructed substantially as and-for the purposes set forth.

2. In such mechanism the combination of a single-thread', fiat-top, solid-cut screw, witha square-toothed wheel, arranged and operating substantially as described. l

3. The air-tube, constructed from a'. single piece of metal, substantially as and for the purposes set forth.A

4, In combination with the endless screw attaching its lower support or bridge lc to the side plate ofthe mechanism, substantially as and for the purpose set forth.

5. The construction of thejewel-plate,having a concave conicaljewebseat, and confined to the supportingplates by a single screw, substantially as and for the purposes set forth.

6. A mechanical movement for lamps, its several parts constructed'and arranged andoperating substanf tially as described. I

' GEO. A. JONES.

Witnesses:

S. D. LAW,

FRED. B. SEARS. 

